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Dark matter capture, subdominant WIMPs, and neutrino observatories
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA.
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA.
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA.
2017 (engelsk)Inngår i: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 95, nr 4, artikkel-id 043007Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Weakly interacting massive particles (WIMPs), which are among the best motivated dark matter (DM) candidates, could make up all or only a fraction of the total DM budget. We consider a scenario in which WIMPs are a subdominant DM component; such a scenario would affect both current direct and indirect bounds on the WIMP-nucleon scattering cross section. In this paper we focus on indirect searches for the neutrino flux produced by annihilation of subdominant WIMPs captured by the Sun or the Earth via either spin-dependent or spin-independent scattering. We derive the annihilation rate and the expected neutrino flux at neutrino observatories. In our computation, we include an updated chemical composition of the Earth with respect to the previous literature, leading to an increase of the Earth's capture rate for spin-dependent scattering by a factor of 3. Results are compared with current bounds from Super-Kamiokande and IceCube. We discuss the scaling of bounds from both direct and indirect detection methods with the WIMP abundance.

sted, utgiver, år, opplag, sider
AMER PHYSICAL SOC , 2017. Vol. 95, nr 4, artikkel-id 043007
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Identifikatorer
URN: urn:nbn:se:kth:diva-205062DOI: 10.1103/PhysRevD.95.043007ISI: 000394664300001Scopus ID: 2-s2.0-85021962411OAI: oai:DiVA.org:kth-205062DiVA, id: diva2:1115579
Merknad

QC 20170627

Tilgjengelig fra: 2017-06-27 Laget: 2017-06-27 Sist oppdatert: 2018-09-19bibliografisk kontrollert

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Baum, SebastianVisinelli, LucaFreese, Katherine
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